Kafka FETCH_SESSION_ID_NOT_FOUND 经常出现在日志中

Question

运行 Kafka 2.3.0、Kafka 客户端 2.1.1，我的经纪人不断输出以下日志：

[2019-09-06 15:18:03,596] INFO [ReplicaFetcher replicaId=1, leaderId=0, fetcherId=0] Node 0 was unable to process the fetch request with (sessionId=1458702821, epoch=538): FETCH_SESSION_ID_NOT_FOUND. (org.apache.kafka.clients.FetchSessionHandler)
[2019-09-06 15:21:11,145] INFO [GroupMetadataManager brokerId=1] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2019-09-06 15:22:33,737] INFO [ReplicaFetcher replicaId=1, leaderId=0, fetcherId=0] Node 0 was unable to process the fetch request with (sessionId=1917353656, epoch=538): FETCH_SESSION_ID_NOT_FOUND. (org.apache.kafka.clients.FetchSessionHandler)
[2019-09-06 15:27:03,768] INFO [ReplicaFetcher replicaId=1, leaderId=0, fetcherId=0] Node 0 was unable to process the fetch request with (sessionId=404608404, epoch=538): FETCH_SESSION_ID_NOT_FOUND. (org.apache.kafka.clients.FetchSessionHandler)
[2019-09-06 15:31:11,145] INFO [GroupMetadataManager brokerId=1] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2019-09-06 15:31:34,313] INFO [ReplicaFetcher replicaId=1, leaderId=0, fetcherId=0] Node 0 was unable to process the fetch request with (sessionId=1690401868, epoch=539): FETCH_SESSION_ID_NOT_FOUND. (org.apache.kafka.clients.FetchSessionHandler)
[2019-09-06 15:36:04,404] INFO [ReplicaFetcher replicaId=1, leaderId=0, fetcherId=0] Node 0 was unable to process the fetch request with (sessionId=1167288700, epoch=538): FETCH_SESSION_ID_NOT_FOUND. (org.apache.kafka.clients.FetchSessionHandler)
[2019-09-06 15:40:34,409] INFO [ReplicaFetcher replicaId=1, leaderId=0, fetcherId=0] Node 0 was unable to process the fetch request with (sessionId=2135343705, epoch=538): FETCH_SESSION_ID_NOT_FOUND. (org.apache.kafka.clients.FetchSessionHandler)
[2019-09-06 15:41:11,145] INFO [GroupMetadataManager brokerId=1] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2019-09-06 15:45:04,930] INFO [ReplicaFetcher replicaId=1, leaderId=0, fetcherId=0] Node 0 was unable to process the fetch request with (sessionId=1735853846, epoch=539): FETCH_SESSION_ID_NOT_FOUND. (org.apache.kafka.clients.FetchSessionHandler)
[2019-09-06 15:49:35,018] INFO [ReplicaFetcher replicaId=1, leaderId=0, fetcherId=0] Node 0 was unable to process the fetch request with (sessionId=599232284, epoch=538): FETCH_SESSION_ID_NOT_FOUND. (org.apache.kafka.clients.FetchSessionHandler)

有很多 FETCH_SESSION_ID_NOT_FOUND 表示什么？有什么办法可以解决这个问题？

我的一半消费者群体不消费任何东西，并产生包含很多FETCH_SESSION_ID_NOT_FOUND行的日志。

Answer 1

正如评论中提到的，这是通过更新 Kafka 解决的。

（对于该用户来说这根本就是一个问题）。如果您有其他症状的问题，则可能是不同的情况，因此请使用不同的问题。